High quality graphite ine yakanakisa mechanicha simba, kugadzikana kwekupisa, kuchinjika kwepamusoro uye yakanyanya kukwira-mundege yekupisa uye magetsi conductivity, zvichiita kuti ive imwe yezvinhu zvakakosha zvemberi zvekushandisa kwakawanda senge photothermal conductor inoshandiswa semabhatiri mumafoni. Semuenzaniso, mhando yakakosha yegraphite, yakanyanya kuodha pyrolytic graphite (HOPG), ndeimwe yeanonyanya kushandiswa mumarabhoritari. Material. Izvi zvakanakisa zvimiro zvinokonzerwa neyakaturikidzana chimiro chegraphite, uko kwakasimba covalent zvisungo pakati pekabhoni maatomu ari mugraphene layers zvinobatsira kune yakanakisa mechaniki zvivakwa, kupisa uye magetsi conductivity, ukuwo kupindirana kushoma pakati pegraphene layer. Chiito chinoguma nehupamhi hwepamusoro. graphite. Kunyange zvazvo graphite yave ichiwanikwa mune zvakasikwa kwemakore anopfuura 1000 uye maumbirwo ayo ekugadzira akaongororwa kwemakore anopfuura 100, kunaka kwema graphite samples, zvose zvechisikigo uye zvekugadzira, zviri kure nekunaka. Semuyenzaniso, ukuru hwemahombe ecrystal graphite domains mune graphite zvinhu anowanzo asingasviki 1 mm, iyo inopesana zvakanyanya nehukuru hwemakristasi mazhinji akadai sequartz single crystals nesilicon single crystals. Saizi inogona kusvika pachiyero chemita. Iyo diki diki diki ye-single-crystal graphite inokonzerwa nekusasimba kwekudyidzana pakati peiyo graphite layers, uye flatness yegraphene layer yakaoma kuchengetedza panguva yekukura, saka girafu inoputsika nyore kuita akati wandei-crystal zviyo miganhu mukusagadzikana. . Kugadzirisa dambudziko guru iri, Muzvinafundo Emeritus weUlsan National Institute of Science and Technology (UNIST) nevamwe vake Prof. Liu Kaihui, Prof. Wang Enge wePeking University, nevamwe vakaronga zano rekugadzira hurongwa hwakatetepa hwehukuru. graphite makristasi mamwe. firimu, pasi kusvika pachiyero inch. Nzira yavo inoshandisa imwe-crystal nickel foil se substrate, uye maatomu e carbon anodyiswa kubva kumashure kwe nickel foil kuburikidza ne "isothermal dissolution-diffusion-deposition process". Panzvimbo pekushandisa gasi kadhibhodhi sosi, ivo vakasarudza yakasimba kabhoni zvinhu kuti ifambise kukura kwegraphite. Iri zano idzva rinoita kuti zvikwanise kugadzira mafirimu e-crystal graphite ane ukobvu hunosvika 1 inch uye 35 microns, kana anopfuura 100,000 graphene layers mumazuva mashoma. Kuenzaniswa nezvose zviripo graphite samples, single-crystal graphite ine thermal conductivity ye ~ 2880 W m-1K-1, zvisingakoshi zvinyorwa zvetsvina, uye zvishoma zvishoma pakati pezvikamu. (1) Kubudirira kuumbwa kwemafirimu e-single-crystal nickel ehukuru hukuru sezvo ma-ultra-flat substrates anodzivirira kukanganisa kwekugadzira graphite; (2) 100,000 akaturikidzana egraphene anorimwa isothermally mumaawa angangoita 100, kuitira kuti imwe neimwe girafu yegraphene inogadzirwa munzvimbo imwechete yemakemikari uye tembiricha, iyo inova nechokwadi cheunifomu yemhando yegraphite; (3) Kuenderera mberi kwekabhoni kuburikidza nedivi reshure reiyo nickel foil inobvumira zvikamu zvegraphene kuti zvirambe zvichikura pamwero wakanyanya, chinenge chinhanho chimwe mumasekonzi mashanu ega ega,"
Nguva yekutumira: Nov-09-2022